\begin{tikzpicture}[>=latex,every node/.style={anchor=south west,,inner sep=0,fill=white}]
	\node(Figure1)[anchor=north] at (-3em,0){  
		\begin{tabular}{|C{4em}|}
			\hline 
			$x_1$\\ 
			\hline
			yy \\ 
			\hline
			zz \\
			\hline
		\end{tabular}
	};
	\node(Figure2)[anchor=north] at (3em,0){  
		\begin{tabular}{|C{4em}|}
			\hline 
			1 \\ \hline
			5 \\ \hline
			20 \\ \hline
		\end{tabular}
	};
	
	\node (text1) at(-5em,0.5em) {符号表I};
	\node (text2) at(1em,0.5em) {常数表C};
	
\end{tikzpicture}